Across
- 1. Vertical column in the periodic table.
- 4. Property of metals and alloys that allows them to be drawn into wires.
- 6. Number of protons in an atom's nucleus.
- 7. Property of metals and alloys that allows them to be hammered or rolled into thin sheets.
- 8. Horizontal row in the periodic table.
Down
- 2. Organized list of all known elements that are arranged by increasing atomic number and by changes in chemical and physical properties.
- 3. Element, such as radium, whose nucleus breaks down and emits particles and energy.
- 5. Sum of the number of protons and neutrons in an atom's nucleus.
- 7. Element that is shiny, malleable, ductile, and a good conductor of heat and electricity.
- 9. Uses the symbol for an element and dots representing the number of electrons in the element's outer energy level.